package com.atguigu.lease.web.admin.service.impl;

import com.atguigu.lease.common.constants.RedisConstant;
import com.atguigu.lease.common.jwt.JwtUtil;
import com.atguigu.lease.common.result.ResultCodeEnum;
import com.atguigu.lease.common.springmvc.LeaseException;
import com.atguigu.lease.model.entity.SystemUser;
import com.atguigu.lease.model.enums.BaseStatus;
import com.atguigu.lease.web.admin.service.LoginService;
import com.atguigu.lease.web.admin.service.SystemUserService;
import com.atguigu.lease.web.admin.vo.login.CaptchaVo;
import com.atguigu.lease.web.admin.vo.login.LoginVo;
import com.atguigu.lease.web.admin.vo.system.user.SystemUserInfoVo;
import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.wf.captcha.SpecCaptcha;
import com.wf.captcha.base.Captcha;
import io.jsonwebtoken.Claims;
import org.apache.commons.codec.digest.DigestUtils;
import org.apache.commons.lang3.ObjectUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.stereotype.Service;


import java.util.UUID;
import java.util.concurrent.TimeUnit;

@Service
public class LoginServiceImpl implements LoginService {

    @Autowired
    private RedisTemplate<String,Object> redisTemplate;

    @Autowired
    private SystemUserService systemUserService;

    /**
     * 获取图形验证码
     * @return
     */
    @Override
    public CaptchaVo sendCode() {
        //1. 生成验证码
        SpecCaptcha specCaptcha = new SpecCaptcha(130,48,4);
        specCaptcha.setCharType(Captcha.TYPE_DEFAULT);//设置生成的内容有数字、字符串、特殊符号等等
        String base64 = specCaptcha.toBase64(); //生成验证码图片
        String code = specCaptcha.text(); //生成正确的验证码字符串

        //2. 正确验证码的值和uuid存储到redis中，uuid是key，验证码code值为value
//        String uuidKey = UUID.randomUUID().toString().replace("-", "");
        //设置验证码过期时间和时间单位
//        redisTemplate.opsForValue().set(uuidKey,code,120, TimeUnit.SECONDS);
        //拼接CaptchaVo (验证码图片和uuid)
        String uuidKey = RedisConstant.ADMIN_LOGIN_PREFIX + UUID.randomUUID().toString().replaceAll("-","");
        redisTemplate.opsForValue().set(uuidKey,code,RedisConstant.ADMIN_LOGIN_CAPTCHA_TTL_SEC, TimeUnit.SECONDS);
        //3. 拼接CaptchaVo
        CaptchaVo captchaVo = new CaptchaVo(base64, uuidKey);
        return captchaVo;
    }

    /**
     * 登录
     * @param loginVo
     * @return
     */
    @Override
    public String login(LoginVo loginVo) {
        //1. 校验验证码是否过期
        String redisCode = (String) redisTemplate.opsForValue().get(loginVo.getCaptchaKey());
        //如果为null则抛出异常
        if(ObjectUtils.isEmpty(redisCode)){
            throw new LeaseException(ResultCodeEnum.ADMIN_CAPTCHA_CODE_EXPIRED);
        }
        //2. 校验验证码是否正确，如果错误抛出异常
        if (!redisCode.equalsIgnoreCase(loginVo.getCaptchaCode())) {
            throw new LeaseException(ResultCodeEnum.ADMIN_CAPTCHA_CODE_ERROR);
        }
        //3. 校验账号是否存在
        LambdaQueryWrapper<SystemUser> lambdaQueryWrapper = new LambdaQueryWrapper<>();
        lambdaQueryWrapper.eq(SystemUser::getUsername,loginVo.getUsername());
        SystemUser systemUser = systemUserService.getOne(lambdaQueryWrapper);
        //账号不存在
        if(systemUser == null){
            throw new LeaseException(ResultCodeEnum.ADMIN_ACCOUNT_NOT_EXIST_ERROR);
        }
        //4. 校验输入的密码和数据库返回的密码是否一致
        String password = DigestUtils.md5Hex(loginVo.getPassword());
        if (!systemUser.getPassword().equals(password)){
            throw new LeaseException(ResultCodeEnum.ADMIN_ACCOUNT_ERROR);
        }
        //5. 判断账号是否可用
        if (systemUser.getStatus() == BaseStatus.DISABLE){
            throw new LeaseException(ResultCodeEnum.ADMIN_ACCOUNT_DISABLED_ERROR);
        }
        //6. 创建token并发送
        String token = JwtUtil.createToken(systemUser.getId(), systemUser.getUsername());
        return token;
    }

    @Override
    public SystemUserInfoVo customInfo(String accessToken) {
        //1. 先解析token，获取Claims
        Claims claims = JwtUtil.parseToken(accessToken);
        //2. claims获取userId
        Integer userId = (Integer) claims.get("userId");
        //3. 通过userId查询用户数据
        SystemUser systemUser = systemUserService.getById(userId);
        //4. 将查出来的用户数据进行赋值
        SystemUserInfoVo systemUserInfoVo = new SystemUserInfoVo();
        systemUserInfoVo.setName(systemUser.getName());
        systemUserInfoVo.setAvatarUrl(systemUser.getAvatarUrl());
        return systemUserInfoVo;
    }
}
